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Replies

OSPF showing only 1 multilayer

wvdvisith
Level 1
Level 1

I used below ospf routing (multi layer ports are no shutdown state)

roue

Screenshot 2023-09-02 141433.jpg

#multi-1

int gig1/0/1
ip address 172.1.6.129 255.255.255.252
no sh
exit

do wr

#multi-2
int gig1/0/1
ip address 172.1.6.133 255.255.255.252
no sh
exit

do wr

#router
int gig0/0
ip address 172.1.6.130 255.255.255.252
no sh
exit

int gig0/1
ip address 172.1.6.134 255.255.255.252
no sh
exit

 

###########OSPF IP routing
#multi(1)
ip routing
router ospf 10
router-id 1.1.1.1
network 172.1.1.0 0.0.0.127 area 0
network 172.1.1.128 0.0.0.127 area 0
network 172.1.6.132 0.0.0.3 area 0

do wr
exit

do reload

#multi(2)
ip routing
router ospf 10
router-id 2.2.2.2
network 172.1.1.0 0.0.0.127 area 0
network 172.1.1.128 0.0.0.127 area 0

network 172.1.6.128 0.0.0.3 area 0

do wr
exit

do reload

#router
router ospf 10
router-id 3.3.3.3
network 172.1.6.128 0.0.0.3 area 0
network 172.1.6.132 0.0.0.3 area 0
network 172.1.6.136 0.0.0.3 area 0
network 195.136.17.0 0.0.0.3 area 0
do wr
exit

1 Accepted Solution

Accepted Solutions

there are many configuration attached in the post, which one correct.

Rather confusing and getting round and round

the P2P address should be same subnet to form OSPF neighborship - so make necessary changes

I would expect show run (full from all devices ( Router, Switch, Multi-layer Switch 1 and 2)

BB

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View solution in original post

7 Replies 7

balaji.bandi
Hall of Fame
Hall of Fame

If the Router need to have 2 OSPF peers with Multi Layer Switch 1 and 2

you need to use Trunk port G0/0 with sub-interfaces ? and you need to configure switch also Trunk port.

 

BB

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How to Ask The Cisco Community for Help

Screenshot 2023-09-02 145341.jpg

on the Router side you need to use sub-interface with dot1q (i can provide the config) but you learning i would like to read below document and understand the concept it will help in real environment when you deploying it.

https://www.ciscopress.com/articles/article.asp?p=2990405&seqNum=2

BB

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I got the general idea about it but i cant figure which ip and vlan should assign to this (i already assign vlan 10-60 is it okay?)

Sure you can any VLAN number as long all are able to communicate to establish OSPF neighborship.

you will be able to make it - still stuck post all show run here so we can provide what to be fix to meet the requirement.

BB

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int gig0/0
no sh
exit

int gig0/0.10
encapsulation dot1Q 10
ip address 172.1.1.1 255.255.255.128
exit

int gig0/0.20
encapsulation dot1Q 20
ip address 172.1.1.129 255.255.255.128
exit

 

 

 

 

 

when i enter this already config one ospf router going to down. can u send me the ip routing config?

my all configs below

there are many configuration attached in the post, which one correct.

Rather confusing and getting round and round

the P2P address should be same subnet to form OSPF neighborship - so make necessary changes

I would expect show run (full from all devices ( Router, Switch, Multi-layer Switch 1 and 2)

BB

***** Rate All Helpful Responses *****

How to Ask The Cisco Community for Help